Drill head for drilling machines



1. F. BUHR.

DRILL HEAD FOR DRILLING MACHINES.

APPLICATIDN FILED JULY 5 1917.

PatentedSept. 5, 1922 3 SHEETS-SHEET 1 www Elftor ne 1go 1.F. EUHR.

DRILL HEAD FOR DRILLING MACHINES.

APPLICATION FILED JuLv 5.1917.

Patentedsept. w22.

3 SHEETS-SHEET 2.

|l l HI I 44 r g nua mko J. F. BUHR.

DRILL HEAD FOR DBILLING MACHINES.

APPLlcArloN man JULY 5.1917.

Patented. Sept. 5, w22..

3 SHEETS-SHEET 3.

3 n ue wtoz Y Patented 5,

tonnen in.. nennen nnritorr, azien-'reanu'r are . .application led July'li,

residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful lin rovements in Drill 'Heads for Drilling Mac ines, of which the rollowing is a specication, reference being had therein to the accompanying drawings. /This invention relates to a drill head for drilling machines and has special reference to certain improvements in connection with that type oli drill head disclosed` by' my Patent No; 1,237,017 granted Aug. 14, 1917.

1n this patent there is disclosed a multiple drill head that may be bodily adjusted in lateral and vertical planes relative to a piece of work, and the present invention aims' to provide this multipledrill head by providing'novel enclosed. means that permits of end drills lbeingl simultaneously adjusted, in a lateral plane, relative to a center drill.

` Fig. 4 is a horizontal sectional lview of the drill head taken on the line .ivy-1V' of Fia 2;

Fig. 5 is a bottom plan of the drill head; Fig. 6 is a detail view of a clamping memloer;

Fig. 7 is a horizontal sectional view taken on the line VIL-V11 of Fig. 2, and

Fig. 8 is a plan of a bolt lock. l

In the drawings, the reference numeral 5 denotes an attaching member providing clearance for the spindle Aoir' a `drilling-ma-` chineI to permit of vertical adjustment in connection withthe drill head.

, The lower lend of the attaching member` 5 has an annular langeengaged by a collar 7 securedby screwbolts 1 to the top of a housing c ap 8k attachedv to a housing 9 by screw bolts 10 or .other fastening means.

Furthermore the present invention aims to include novel thrust andier?. 'sensi no. naast.'

By loosening the screw bolts 1 the housing'.

cap and its housing can be Aswung in a horizontal plane and adjusted relative to the flange 6 of the attaching member 5.

iJlhe cap 8 has a central opening 13 pro# viding clearance for a coupling member 4 having aj shank or s indle 3 and surrounding the opening 13 is an upstanding flange 1 4. ISeatedon' theilange "14 is an antifrictional bearing 15 which supports the coupling i member 4 by engaging a collar 16 on said coupling member.` The coupling member 4 extends through the cap 8 into the housing 9 and liked on said coupling member is the A hub portion 17 of a main gear 18.' An antig. fractional bearing 19 is interposed between the hub of the gear wheel 18 and the inside of the flange l14 of the cap, and a gear wheel 21'.is loosely mounted on the hubportion 17 in. the bottom of the housing 9. v.'llhe antifrictional bearing 19 is onithe hub portion y 17 of the gear wheel 18 'and serves end thrust bearing.

The bottom of the housing 9 has a central opening 22and end openings 23. Enf' tending into the end openings 23 are the as en; i

upper ends 24 of casings 25 and keyed upon the inner ends of said casings are gears 23 ously adjusted by simply manipulating one of the casings and this is an important feature of the present invention. Vertical displacement othe end casings is prevented by tie rods or bolts 27 extending through the cap 8 and V.provided with heads 28 keyed or otherwise xed as at 29, in supporting each of the bolts 27 are coupled gear wheels 30 and 31, the gear wheels. 30 being mount A 'I ed on 4extended hubs 31a of the gear wheels 31. These gear wheels are' supported by members 20 seatedv in thecap 8. Loose on l ico? anti-frictional bearings 32 and 34 with the gear wheels 30'meshing withthe main gear wheel- 18 of the coupling member 4. AThe gear wheels 31 mesh with gear wheels 35 on sockets 36 within oilsetsocket members 37 .carried by the casings 25. ,Each socket is held in position'by anti-frictional bearings 38, 39 and 40, `the last two mentioned bear,`

ings cooperating with a collar 41 on the socket 36 as end thrust bearings. .A -detachable cap or-plug 42 permits of the bearings4 rods 27 and thus swing the socket members 37 about the casings as an axis. After the casings have been adjusted the screw bolts 45 may be set in ixed engagement with the flanges 43 to lock the end casings and socket members in adjusted positions.

The socket members 37 are rovided with inverted T-shaped slots 46 an rotatable on the sockets 36 are slotted sleeves 47. These slotted sleeves are provided with pins 48 extending through lateral pprtions of the slots 46 so that the sleeves 47 may be rotated to register with slots 46EL in the sockets 36, so that a suitable instrument may be driven into said slots to force the tang of a drill' 49 from the sockets. The rotatable sleeves 47 permit of the slots` being closed to a certain extent to exclude dirt, and other matter that may interfere` with the bearings or other parts within the socket members.

Connected to the bottoml of the housing 9, as at 60, is a central socket member 50 containing a socket 51 articulated with the coupling member 4. The socket 51 is constructed and supported similar to the sockets 36 previously referred to and said socket is adapted to receive a center drill. 4

In operation, the vcoupling member 4 imparts movement to the gears 18, 30, 31 and 35 and during this operation, the various anti-frictional bearings take care of any end thrust to which the end and center drills may be sub'ected. By loosening the screw bolts l the ousing 9 may be bodily swung about the coupling member as an axis and by loosenin the screw bolts the end casings may ie simultaneously adjusted to swing the end socket members in reverse directions, so that end drills may be maintained in the same vertical plane as the center drill, if such drill is used. The preferred embodiment of my inven tion has been illustrated, but it is to be under-stood that the structural elements are susceptible to such variations and modifications as fall within the scope of the ap pended claim.

What I claim is l A drill head comprisin a spindle, a member, 'a housing attache to said member and provided with openings, supporting members in the openings of said housing, casings extending into the bottom of said housing and supported from said supporting members, drill socket members in said casings, gears adapted to operate said drill socket members from said spindle, and gears on the inner ends of said casings to cause simultaneous adjustment of said casings, a'nti-frictional bearings in the openings of said housing for some of the gears therein, and anti-frictional bearings in said casings for the drill socket members therein.

In testimony whereof I aliix my signature in the presence of two witnesses.

JOSEPH F. BUHR.

Witnesses:

KARL'H. BUTLER, ANNA M. DORR. 

